[growse]

Buildjet seems to be KVM-based, so does the job still runs in a VM?

Does it support nested KVM, e.g. for running Android espresso / emulator tests?

[thinkafterbef]

Yes, job runs in a KVM VM. Nested KVM is supported on the hypervisor, but KVM is not enabled by default in guest OS, due to we run a guest kernel for faster booting time. We will offer an option to enable kvm kernel module in the future.